Complete Question
The complete question is shown on the first uploaded image
Answer:
The value is 
Explanation:
From the question we are told that
The mass of the block is 
The initial speed of the block before entering the rough section is 
The time taken is t = 0.5 s
The speed with which the block leaves the rough section is 
Generally from kinematic equation
=> 
=> 
=> 
Generally the magnitude of the average frictional force is mathematically represented as
=>
=> 
The negative sign show that the force is acting in the opposite direction to the direction of motion of the block
Answer:
a) FB = 260 [N]
b) FT = 230 [N]
Explanation:
In order to solve this problem we must use a static analysis, since Globe does not move. For a better understanding in solving this problem, a free body diagram with the forces acting on the globe is attached.
The buoyant force acts upward as it causes the balloon to tend to float, the weight of the balloon tends to lower the balloon and the downward tension force does not allow the balloon to float
The buoyant force is defined by the following equation:
FB = Ro*V*g
where:
FB = Buoyant force [N]
Ro = density of the air = 1.3 [kg/m^3]
V = volume of the balloon = 20 [m^3]
g = gravity acceleration = 10 [m/s^2]
FB = 1.3*20*10 = 260 [N]
Now we do a sum of forces equal to zero in the y-axis
FB - 30 - FT = 0
260 - 30 = FT
FT = 230 [N]
The order from the magic mirror from the top would be more larger than the bottom.
Newton 3rd law of motion which says action and reaction are equal and opposite. just like if you fill up a ballon with air it losses mommentum it loses the greater it flies around.
so rocket achieve thrust and moves when you exert a huge amount of mass at high speed
and also its able to move or fly to space due to rocket staging
It's C because no mass is lost or gained in heating and also lava doesn't burn into smoke, like at all.
